checkstyle.xml

<?xml version="1.0"?>

<!--
  ~ Copyright (C) 2016 Alessandro Yuichi Okimoto
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~     http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  ~ Contact email: alessandro@alessandro.jp
  -->

<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
<module name="Checker">
    <module name="FileTabCharacter" />
    <module name="SuppressWarningsFilter" />
    <module name="RegexpSingleline">
        <property name="format" value="^\s*(for|if)[^ ]" />
        <property name="message" value="Space needed before opening parenthesis." />
    </module>
    <module name="RegexpSingleline">
        <property name="format" value="^\s*for \(.*?([^ ]:|:[^ ])" />
        <property name="message" value="Space needed around ':' character." />
    </module>
    <module name="TreeWalker">
        <module name="ConstantName" />
        <module name="LocalFinalVariableName" />
        <module name="LocalVariableName" />
        <module name="MemberName">
            <property name="format" value="^m[A-Z][a-zA-Z0-9]*$" />
            <property name="applyToPublic" value="false" />
            <property name="applyToPackage" value="false" />
        </module>
        <module name="MethodName">
            <property name="format" value="^[a-z][a-zA-Z0-9_]*$" />
        </module>
        <module name="StaticVariableName">
            <property name="format" value="^s[A-Z][a-zA-Z0-9]*$" />
        </module>
        <module name="PackageName" />
        <module name="ParameterName" />
        <module name="TypeName" />
        <module name="AvoidStarImport" />
        <module name="IllegalImport" />
        <module name="RedundantImport" />
        <module name="UnusedImports" />
        <module name="LineLength">
            <property name="max" value="150" />
        </module>
        <module name="MethodLength">
            <property name="max" value="35" />
            <property name="countEmpty" value="false" />
        </module>
        <module name="GenericWhitespace" />
        <module name="EmptyForIteratorPad" />
        <module name="MethodParamPad" />
        <module name="NoWhitespaceAfter" />
        <module name="NoWhitespaceBefore" />
        <module name="ParenPad" />
        <module name="TypecastParenPad" />
        <module name="WhitespaceAfter" />
        <module name="RedundantModifier" />
        <module name="LeftCurly" />
        <module name="RightCurly" />
        <module name="CovariantEquals" />
        <module name="EmptyStatement" />
        <module name="EqualsHashCode" />
        <module name="IllegalInstantiation" />
        <module name="HideUtilityClassConstructor" />
        <module name="InterfaceIsType" />
        <module name="ArrayTypeStyle" />
        <module name="SuppressWarningsHolder" />
    </module>
</module>